Marine boiler



Aug.' 7, 1923.

R. WALSH MARINE BOI LER Filed Noy. 28

Patented .1l-hug.. 7, 1923.

Brennan wenen, or atenei/ia.

MARNE BOILEE'..

Application filed. November 28, 191.2.

.To all whom t may concern.'

Ee it lrnown that l, Riez-mno VVALsi-r, a citizen of the United States, residing at Mobile, in the county ol? Mobile and State of ,.filabaina, have invented certain new and useful improvements in Marine Boilers, ot which the 'following is a specification.

This invention relates to certain new and useful improvements in Cornish or Scotch marine boilers of that zgeneral type in which provision is made for more thorough utiliza-- tion oit the heating power, and at the same time facilitating the circulation of' water and causing a more rapid `generation of steam. Such general type will be found in my Patent No. 1,317,744, October 7 1919. The present invention also is applicable to fire-box boilers, as will be evident as the description proceeds.

The present invention has for its objects among others to` provide simple and eilicient means for blowing,- out theseaiment from the bottom ot' the boiler.

It has for a further object to provide sirnple and eliicient means for thoroughly cleansingy the coils with steam to remove the grease and scale which is liable to `accumulate therein.

lt has for a further object to provide simple and efficient means to prevent sagging,

of the coils, which sagging is liable to cause leakage.

lf aim further at improvements in the details of construction as will hereinafter be made clear. i

@ther objects and advantages of the invention will hereinafter appear and the novel features thereof will `be particularly pointed out in the appended claim. i

The invention is clearly illustrated in the accompanying; drawings, which, with the numerals of reference marked thereon, torni a part of this specification, and in which- Figure 1 is a vertical longitudinal section through the rear end of the boiler, with parts in section and a portion broken away.

Figure 2 is an end view, looking` from the right ot Figure 1.

Lilie numerals of reference indicate like parts throughout the several views.

My present improvement may be placed in the back connection of the furnace or in any other suitable position, although that herein illustrated is what l, at the present time, consider preferable. lt is evident, however, that the invention is not restricted Serial No. 3111,06?.

to this exact disposition of the parts,y the right being,` reserved to maire such changes and variations as come hilly within the scope o'l the appended claim.

ln the present instance l have shown the improvement-s as applied 'to a boiler l, oli which 2 is the rear end or head.

3 are ther tubes ot the boiler ot well-known construction.

Referring first to Figure l, l desiggjnates a pipe extending within the lower portion oi the boiler, being1 disposed as low as practical therein and outside the head or end 2 of the boiler is provided with a valve 5.

6 is a. pipe connected by suitable coupling with the pipe fl outside the boiler, and rising -from this pipe 6 is a pipe 8 ii'rom the upper end of whichv entends the lateral pipe passed through the end of ythe boiler and through a suitable encirclingl sleeve or the like 10, and within the boiler, provided with a coil 11 which entends back and forth transversely of the boiler, as seen best in Figure 2. y i

Connected with the upper end of the coil is a pipe 12 extended through the head or end 2 andithrough a suitable protecting sleeve or the like 13. Connected with this pipe 12 isan upwardly extended pipe 14C from which extends the lateral branch 15 provided with a valve 16 and communleat-"4 connected with thesteam dome, 22, and provided with a valve 23. i

221 is pipe connected with tlse pipe 6 and provided wit1 a valve 25. 2S is check` valve in the pipe 6, seen in llioure 2 27 is a pipe shown as vertically disposed and at its upper end provided with a threeway valve 28 controlling the flow from the feed pump through the pipe 29, the flow to the boiler through the pipe 30 and the ilow through the pipe 27 to the heating coil or system within the end of the lire-box, as indicated by the arrows in Figure 1. 31 is a valve controlling the How through the pipe 27 into the pipe 9 and thence into the coil 11. 82 is a check valve in the connection between the pipe 27 and the valve 3l, as clearly in Figure 2..

As indicated in Figure 2, the boiler is of the type embodying three furnaces 33, 3a and 35, indicated by dotted lines.

As will be clearly understood upon reference to Figures 1 and 2, the valve 16 con- Ytrols the feed entrance from the heater or so thc water will flow through the pipe 29 r and thence through the pipes 27 and 9 into the coil 11. When it is desired to cut out the heater, the three-way valve 28 is turned so as to close the iow through the pipe 29 to the pipe 27 and the valves 3l, 16 and 5 closed. Then it is desired to blow out the sediment from the bottom of the boiler, which it is desirable to do intervals so as to get rid of the sediment and prevent its accumulation and ultimately passing up into the pipe and coils and stopping the circulation and causing the coils to burn, the valve is opened and the sediment will be blown out through the bottom blow-out pipe 4-6-24.

In order to thoroughly clean the coils with steam, the valves 16 and 5 are closed, the bottom blow-out valve 25 is opened and the valves 2O and 23 opened so as to turn on the steam and the latter passing through the coils will heat them. and the grease so that the scale and grease in said coils will pass out through the bottom blow valve 25. This will serve to keep the coils perfectly clean and free of grease and scale which, unless blown out occasionally, will gradually accumulate in the coils, and both the grease and scale being non-conductors of heat, the heat will not pass into the boiler. Furthermore, the coils will burn, the same as will a furnace under similar conditions,

due to the high temperature to which they are exposed. I find that the steam is a simple, practical and economical means for cleaning the grease from the coils and, at the same time, it cracks the scale which passes out through the bottom blow-out Vinnesca pipe. In lieu of a single connection from the coils to the feed entrance from the heater to the boiler, I may sometimes employ two, as shown in Figure 2, wherein the pipe is employed which is connected with the coil and also controlled by the valve 16. This is accomplished by making an additional opening from' the back connect-ion through the back head, and a tube of ample size expanded. This makes three openings in the back head and back connection, as shown, and this constitutes a rigid brace or support for the back of the coils, doing away with any chance of the coils sagging due to constant vibration when the vessel is running. This sagging of the coils is liable to cause a leak as the elbows into which the extensions are engaged may start just enough to leak and put the coil out of commision. lith the double support, the liability of a downward sag or movement is entirely eliminated. To insure that the water is carried as intended through the coils, the opening through this pipe is reduced just enough opening being left for a slight circulation. The length of the coils is varied to suit the individual boiler.

vWhat I claim as new is In a boiler, a heater coil, a pipe extended within the lower portion of the boiler and provided outside the boiler with a valve, a pipe connected with said pipe, a pipe rising from the last-named pipe, a lateral branch therefrom connected with said coil, a pipe leading from. the upper part of the coil, an upwardly-extended pipe leading from the last-named pipe and having a lateral branch with a valve, a pipe connected with said branch and extended within the upper part of the boiler below the water line, a steam pipe connected with the steam dome and with said branch and provided with a valve, a pipe extended upwardly and connected with the boiler and having means for connection with a feed pump, and a three-way valve controlling the flow from the feed pump, the flow to the boiler, and the fiow through said pipe to the heater coil.

In testimony whereof I affix my signature.

RICHARD VALSI-I. 

